Drop-out fuse insulated bearing, static and dynamic contact, fuse
tube composed of three parts. The static contact at both endsof the
insulated bearing fuse also oxygen tube from the inner arc tube and
the outer layer of phenolic paper tube or glass fiber
cloth tube composition.
Pull the load drop fuse elastic auxiliary contact and interrupter
cover for the division and the load current. Drop-out fuse in
normal operation, the fuse tube to form a closed position with the
fuse tension. When a system failure, the fault current to thefuse
to fuse rapidly, in parallel into the arc, the arc tube arc
bumning, decomposition of large amounts of gas within the
tubeformed at high pressure and strong vertical blowing along the
pipeline, electric household quickly pulled long extinguished.
Fuse blows, the lower part of the static contact to lose the
tension and the next turn, so that the tightening of agency to
releasethe fuse tube, fuse tube drop to the formation of the
apparent breaking position. Opened the moving contact when the need
topull the load, with insulating rod, take the inititive at this
time, the static contact is still contact, insulating rod to pull
the
contacts, auxiliary contacts separate arcing between his early, arc
in the arc chute slit was stretched, the interrupter cover gasin
the current zero, the arc will extinguish.
Drop-out fuse is applicable to the frequency of 50HZ, rated voltage
of 35KV and below the power system, installed in thehigh pressure
side of the distribution transformer or distribution of the trunk
road. The main function of place to protect the
performance of less demanding, it can be used in conjunction with
isolation switch, instead of the automatic air switch; can alsobe
used in conjunction with the load switch, instead of the high cost
of the circuit breaker. Also has short circuit protection,overload
and circuit isolation.
| Type | PD-24 | PD-24 |
| Rated Voltage(kV) | 24 | 24 |
| Rated current(A) | 100 | 200 |
| Breaking current(A) | 10000 | 12,000 |
| Impulse voltage(kV) | 150 | 150 |
| Power frequency wihstand voltage(kV) | 65 | 65 |
| Creepage distance(mm) | 540 | 540 |
| Weight(kg) | 4.5 | 4.5 |
| Dimensions(CM) | 51X34X11.5 | 51X34X11.5 |
